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Nebula
A nebula is a giant cloud of gas (mostly hydrogen and helium) and cosmic dust situated between stars in the interstellar medium. Nebulae serve as sites of stellar birth and death—including emission nebulae that glow from ionized gas, reflection nebulae that scatter starlight, and dark nebulae that obscure background stars.
Source: science.nasa.gov
APODs including "Nebula"
The Ghostly Veil Nebula
31/10/2019
M42: Inside the Orion Nebula
30/10/2019
The Ghosts of Cassiopeia
25/10/2019
Dark Seahorse in Cepheus
24/10/2019
BHB2007: A Baby Binary Star in Formation
16/10/2019
The Galaxy Above
15/10/2019
The Horsehead Nebula
06/10/2019
Molecular Clouds in the Carina Nebula
02/10/2019
Orion Rising over Brazil
30/09/2019
MyCn 18: The Engraved Hourglass Planetary Nebula
29/09/2019
The Annotated Galactic Center
27/09/2019
The Pelican Nebula in Gas, Dust, and Stars
25/09/2019
The Tulip in the Swan
21/09/2019
Along the Western Veil
19/09/2019
The Iris Nebula in a Field of Dust
12/09/2019
IC 1805: The Heart Nebula
11/09/2019
M31: The Andromeda Galaxy
09/09/2019
In Wolf's Cave
07/09/2019
The Large Cloud of Magellan
05/09/2019
The Spider Nebula in Infrared
04/09/2019
Spitzer's Orion
31/08/2019
NGC 7129 and NGC 7142
30/08/2019
M27: Not a Comet
29/08/2019
Dark Dust and Colorful Clouds near Antares
27/08/2019
NGC 2170: Angel Nebula Still Life
26/08/2019
NGC 1499: The California Nebula
23/08/2019
The Orion You Can Almost See
21/08/2019
1901 Photograph: The Orion Nebula
17/08/2019
The Elephant's Trunk Nebula in Cepheus
16/08/2019
Supernova Cannon Expels Pulsar J0002
13/08/2019